Improvement in quartz-mills



D. D. MALLORY.

Quartz Mill.

vN0. 112,059. Patented Feb. 21, 1871.

DDMaHQry QUARTZ MILL.

l FEB 21 1871 dimitir iutet @anni I entre DAvrD n. MALLORY, or Mrs'rror BRIDGE, CONNECTICUT.

Letters Patent No. 112,059, dated February 21, 1871.

IMPROVEMENT vIN QUARTZ-MILLS,

The Schedule referred to in these Letters Patent and mal-zing part of the lame.

.and figures of'reference marked thereon.

Figure l ofthe drawiu g is a represen tation of acent-ral vertlcal sect-ion.

Figure 2 is a vertical cross-section.-

My invention is an improvement on the quartz-mill for which a patent was granted toN. Goodwin, Jr.,

dated September 26, 1865, No. 50,115 and It consists in the form ofthe grinding-wheels, in the feedingaud delivery-pipes, and in the regulating-valve applied to the exhaust-pipe, whereby it is designed to accomplish'the crushing and pulverizing of quartz and other substance in a superior manner.

A A represent two cast-iron cylinders, with an open space betwixt, as shown on the drawing.

Inside of these cylinders are revolving wheels or plates, B B', revolving toward the center, as indicated by the arrows.

. 0n the ends of these wheels are fastened, with bolts and nuts, pieces oi' chilled or other hardened iron, which come in contact with the material to be crushed. These pieces are marked a on the drawing.l

vThe wheels are secured on the shafts I.) D?.

These shafts turn 'in suitable bearings or boxes, and are driven with rapidity in direction of the arrows by means of belts on pulleys. v

E represents the hopper, arranged over the center of the twocylinders. It is arranged to feed the material to be ground close to the 'axes of the wheels by means of the pipes bb. y

F represents an inclined` ridge between the wheels, the'object of which is to offer a resistance to the thrown material, and thus prevent it from shooting under the opposite wheels, and .to assist in breakingthe material to pieces. y

The' dust is carried off from the machine through the4 pipe H at ,the top by thev current of air which is produced by the rotation ofthe grinding-wheels in the cylinder acting" in the manner of a blower.

Any particles of material not suiciently reduced in the first rotation fall by their own weight, and are again caught-'by the revolving arms and discharged again,V

and so on till-thereduction is complete. l

The draught of air is regulated by a vulve, I, in the pipe H. A

17Ihe draught, of course, will determine the ineness of the quartz-dust, as a light current of airwill only blow ol'- fine particles and a strong current large particles.

O Zaz'm.

DAvID D, MALLoRr.

4IJeSSeS.

Witnesses:

GEO. W. MALLQRY, Taos. E. PAoKEB. 

